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Career ratings for: Hajtun, Josef

  Date of rating  

World Rank Rating +/- Age
06/30/1951#183229775
12/31/1951#161228775
06/30/1952Inactive228586
12/31/1952Inactive227986
06/30/1954#180232174
12/31/1954#170234571
06/30/1955#185236063
12/31/1955#162236861
06/30/1956#164235072
12/31/1956#171235969
06/30/1957Inactive234882
12/31/1957Inactive235778
12/31/1958Inactive234589
03/31/1964#321229364
06/30/1964#390220464
09/30/1964#379220564
12/31/1964#417219764
03/31/1965#348230860
06/30/1965#393227160
09/30/1965#387227160
12/31/1965#368226360
03/31/1966#375227659
06/30/1966#395224859
09/30/1966#409225159
12/31/1966#418225259
03/31/1967#413227466
06/30/1967#444224866
09/30/1967#439224966
12/31/1967#425224966
03/31/1968#405227275
06/30/1968#443224575
09/30/1968#454224375
12/31/1968#459224775
03/31/1969Inactive227686
06/30/1969Inactive225186
09/30/1969Inactive225086
12/31/1969Inactive225685
02/28/1970Inactive225485

These ratings, calculated for Hajtun, Josef, incorporate all games (against rated opponents) played in the year before the "Date of rating", along with the ratings that were already calculated one year previously. If a player has an insufficient number of games in recent years, there may be gaps in the list, even though you may see ratings listed on previous and/or subsequent dates. Whenever a player has played no rated games for three straight years, or dies, they are removed from the list.

Definition of columns in the above list:

Date of rating is the "effective date" of the rating. The rating calculation does not include any games occurring after the "Date of rating".

World Rank refers to the player's world rank on that date.

Rating is the calculated rating for the player, as of the "Date of Rating". This represents the player's estimated strength on the following day.

+/- is the standard deviation of the player's rating estimate. It is based on a geometric average of the number of rated games played in past years. Players who play very frequently will have a smaller +/- value, indicating a greater confidence in the accuracy of their rating. Players whose +/- value exceeds 76 are classified as "Inactive" due to their infrequent play against rated opponents. Mathematically, a player's rating is an estimate of their exact strength on the day after the "Date of Rating". The +/- value represents the standard deviation of that estimate; the player's true strength on that date should be within one standard deviation of their calculated rating approximately 68% of the time, and within two standard deviations of their calculated rating approximately 95% of the time.

Age is the player's exact age in years, on the "Date of Rating". If a player's age is displayed as a link, that means that this rating was active at the time of their next birthday. Click on the link to see the sorted list of all players' ratings on their birthdays when turning that same age.

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